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Rheological characteristics of suspensions and structure of Al2O3‒‒CaO and Al2O3‒SrO composites
https://doi.org/10.17073/1683-4518-2022-6-17-20
Abstract
The results of studies of aluminum oxide suspensions made with different CaO and SrO contents are presented. An increase in the pH level was recorded with an increase in the content of calcium and strontium oxides in aluminum oxide suspensions. With an increase in the CaO content from 0,45 to 2,25 mol. % and SrO from 0,42 to 2,14 mol. % exponential growth of dynamic viscosity is observed in Al2O3 suspensions. In the sintered materials, in the suspension of which CaO and SrO were introduced, there are reflexes of the compounds CaAl12O19 and SrAl12O19, respectively. These compounds have a lamellar structure. Ill. 4. Ref. 15. Tab. 2.
About the Authors
N. Yu. CherkasovaRussian Federation
R. I. Kuz’min
Russian Federation
K. A. Antropova
Russian Federation
N. Yu. Burkhinova
Russian Federation
References
1. Tuan, W. H. Mechanical properties of Al2O3/ZrO2 composites / W. H. Tuan, R. Z. Chen, T. C. Wang [et al.] // J. Eur. Ceram. Soc. ― 2002. ― Vol. 22, № 16. ― P. 2827‒2833.
2. Burger, W. High strength and toughness alumina matrix composites by transformation toughening and «in situ» platelet reinforcement (ZPTA) ― the new generation of bioceramics / W. Burger, H. G. Richter // Key Eng. Mater. Trans. Tech. Publications. ― 2000. ― Vol. 192‒195. ― P. 545‒548.
3. Земцова, Е. Г. Формирование и механические свойства алюмокислородной керамики на основе микро- и наночастиц оксида алюминия / Е. Г. Земцова, А. В. Монин, В. М. Смирнов [и др.] // Физическая мезомеханика. ― 2014. ― Т. 17, № 6. ― С. 53‒58.
4. Мыльников, В. В. Исследование влияния керамических материалов на работоспособность режущего инструмента / В. В. Мыльников, А. И. Пронин, Е. А. Чернышев // Труды НГТУ им. Р. Е. Алексеева. ― 2011. ― Т. 1. ― С. 227.
5. Kruzic, J. J. Crack blunting, crack bridging and resistance-curve fracture mechanics in dentin: effect of hydration / J. J. Kruzic, R. K. Nalla, J. H. Kinney, R. O. Ritchie // Biomaterials. Elsevier. ― 2003. ― Vol. 24, № 28. ― P. 5209‒5221.
6. Podzorova, L. I. Al2O3-based ceramic composites with a high brittle fracture resistance / L. I. Podzorova, A. A. Il’icheva, O. I. Pen’kova [et al.] // Inorganic Materials. ― 2019. ― Vol. 55, № 6. ― P. 628‒633.
7. Podzorova, L. I. Ceramic composites of the zirconium dioxide and aluminum oxide system including strontium hexaaluminate / L. I. Podzorova, A. A. Il’icheva, V. P. Sirotinkin [et al.] // Glass and Ceramics. ― 2021. ― Vol. 78, № 5. ― P. 231‒236.
8. Cui, K. Microstructure and mechanical properties of CaAl12O19 reinforced Al2O3‒Cr2O3 composites / K. Cui, T. Fu, Y. Zhang [et al.] // J. Eur. Ceram. Soc. ― 2021. ― Vol. 41, № 15. ― P. 7935‒7945.
9. Li, J. Structural studies of CaAl12O19, SrAl12O19, La2/3 + δ Al12–δO19, and CaAl10NiTiO19 with the hibonite structure; indications of an unusual type of ferroelectricity / J. Li, E. A. Medina, J. K. Stalick [et al.] // Zeitschrift für Naturforschung B. ― 2016. ― Vol. 71, № 5. ― P. 475‒484.
10. Черкасова, Н. Ю. Влияние процентного содержания SrAl12O19 на трещиностойкость алюмоциркониевой керамики / Н. Ю. Черкасова, А. А. Батаев, С. В. Веселов [et al.] // Огнеупоры и техническая керамика. ― 2019. ― Т. 4/5. ― С. 18‒23.
11. Tsetsekou, A.Optimization of the rheological properties of alumina slurries for ceramic processing applications. Part I: Slip-casting / A. Tsetsekou, C. Agrafiotis, A. Milias // J. Eur. Ceram. Soc. ― 2001. ― Vol. 21, № 3. ― P. 363‒373.
12. Kuzmin, R. I. Strontium hexaaluminate formation in alumina and alumina‒zirconia matrixes / R. I. Kuzmin, N. Y. Cherkasova, A. A. Bataev [et al.] // Ceram. Int. ― 2021. ― Vol. 47, № 5. ― P. 6854‒6859.
13. Altay, A. Microstructural evolution of calcium-doped α-alumina / A. Altay, M. A. Gülgün // J. Am. Ceram. Soc. ― 2003. ― Vol. 86, № 4. ― P. 623‒629.
14. Rani, D. A. Effect of rare-earth dopants on mechanical properties of alumina /D. A. Rani, Y. Yoshizawa, K. Hirao, Y. Yamauchi // J. Am. Ceram. Soc. ― 2004. ― Vol. 87, № 2. ― P. 289‒292.
15. Sktani, Z. D. I.Effects of La2O3addition on microstructure development and physical properties of harder ZTA‒CeO2 composites with sustainable high fracture toughness / Z. D. I. Sktani, N. A. Rejab, A. F. Z. Rosli [et al.] // Journal of Rare Earths. ― 2021. ― Vol. 39, № 7. ― P. 844‒849.
Supplementary files
For citation: Cherkasova N.Y., Kuz’min R.I., Antropova K.A., Burkhinova N.Y. Rheological characteristics of suspensions and structure of Al2O3‒‒CaO and Al2O3‒SrO composites. NOVYE OGNEUPORY (NEW REFRACTORIES). 2022;1(6):17-20. https://doi.org/10.17073/1683-4518-2022-6-17-20
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